package com.atguigu.lease.common.utils;

import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import io.jsonwebtoken.*;
import io.jsonwebtoken.security.Keys;

import javax.crypto.SecretKey;
import java.util.Date;

public class JwtUtil {

    private static SecretKey secretKey = Keys.hmacShaKeyFor("M0PKKI6pYGVWWfDZw90a0lTpGYX1d4AQ".getBytes());

    public static String createToken(Long userid,String username){

       String jwt =  Jwts.builder().setExpiration(new Date(System.currentTimeMillis() + 3600000))
                .setSubject("LOGIN_USER")
                .claim("userid",userid)
                .claim("username",username)
                .signWith(secretKey, SignatureAlgorithm.HS256)
                .compact();
        return jwt;
    }

    public static Claims parseToken(String token){

        if (token == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        }
        try{
            JwtParser jwtParser = Jwts.parserBuilder().setSigningKey(secretKey).build();
            Jws<Claims> claimsJws = jwtParser.parseClaimsJws(token);
            return claimsJws.getBody();
        }catch (ExpiredJwtException e){
            throw new LeaseException(ResultCodeEnum.TOKEN_EXPIRED); //给前端返回过期
        }catch (JwtException e){
            throw new LeaseException(ResultCodeEnum.TOKEN_INVALID);
        }

    }

    public static void main(String[] args) {
        System.out.println(createToken(1L, "13888888888"));
    }
}
